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Subject (Region)
- United States16,472
- Great Britain504
- Canada335
- Germany282
- France246
- Italy241
- California217
- Europe199
- Japan198
- New York (State)192
- Developing countries181
- China153
- District of Columbia142
- Illinois142
- India142
- New York133
- Connecticut114
- Spain110
- South Africa106
- United States105